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Patient dose from 3D rotational neurovascular studies

¹ Northern Ireland Regional Medical Physics Agency, Forster Green Hospital, Belfast BT8 6HD, ² Department of Neuroradiology, Royal Victoria Hospital, Belfast BT12 6BA, ³ Health and Rehabilitation Research Institute, University of Ulster, Shore Road, Newtonabbey BT37 0QB, UK

View larger version (9K): [in this window] [in a new window]   Figure 1. kV–mA response for exposures during rotational angiography. Moving from left to right along the curve corresponds to increasing attenuation of the X-ray beam.

View larger version (14K): [in this window] [in a new window]   Figure 2. Distribution of patient effective doses for 3D RA and 2D DSA during the aneurysm evaluation stage of the examination. The abscissa has a logarithmic scale in order to better illustrate the nature of the distributions.